1 /* This header file is shared by client & server. They really have
2 * something to share...
5 /* Client/server protocol is as follows:
7 Send 64-bit cliserv_magic
8 Send 64-bit size of exported device
9 Send 128 bytes of zeros (reserved for future use)
17 #if SIZEOF_UNSIGNED_SHORT_INT==4
18 typedef unsigned short u32;
19 #elif SIZEOF_UNSIGNED_INT==4
20 typedef unsigned int u32;
21 #elif SIZEOF_UNSIGNED_LONG_INT==4
22 typedef unsigned long u32;
24 #error I need at least some 32-bit type
27 #if SIZEOF_UNSIGNED_INT==8
28 typedef unsigned int u64;
29 #elif SIZEOF_UNSIGNED_LONG_INT==8
30 typedef unsigned long u64;
31 #elif SIZEOF_UNSIGNED_LONG_LONG_INT==8
32 typedef unsigned long long u64;
34 #error I need at least some 64-bit type
37 #include <linux/nbd.h>
39 u64 cliserv_magic = 0x00420281861253LL;
40 #define INIT_PASSWD "NBDMAGIC"
42 #define INFO(a) do { } while(0)
44 void setmysockopt(int sock)
48 if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &size, sizeof(int)) < 0)
49 INFO("(no sockopt/1: %m)");
53 if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &size, sizeof(int)) < 0)
54 INFO("(no sockopt/2: %m)");
58 if (setsockopt(sock, IPPROTO_TCP, TCP_MAXSEG, &size, sizeof(int)) < 0)
59 INFO("(no sockopt/3: %m)");
63 void err(const char *s)
65 const int maxlen = 150;
69 strncpy(s1, s, maxlen);
70 if (s2 = strstr(s, "%m")) {
71 strcpy(s1 + (s2 - s), strerror(errno));
73 strcpy(s1 + strlen(s1), s2);
76 /* Solaris doesn't have %h in syslog */
77 else if (s2 = strstr(s, "%h")) {
78 strcpy(s1 + (s2 - s), hstrerror(h_errno));
80 strcpy(s1 + strlen(s1), s2);
88 fprintf(stderr, "Error: %s\n", s1);
96 openlog(MY_NAME, LOG_PID, LOG_DAEMON);
98 setvbuf(stdout, NULL, _IONBF, 0);
99 setvbuf(stderr, NULL, _IONBF, 0);
102 #ifdef WORDS_BIGENDIAN
110 u32 lo = a & 0xffffffff;
114 return ((u64) lo) << 32U | hi;
117 #define htonll ntohll